After exporting memos to memory card these can be converted to text (txt) files by VntConverter. These text files can be modified as usual with an editor like Notepad++ (text files are written with UTF-8 encoding). Afterwards they can be converted back to memo (vnt, vNote) files again by VntConverter. The last step is to reimport them into the Memo App.
Did what it was supposed to, but could have been a bit more intuitive or better explained (if it did at all) that the second folder chosen was where it placed the converted files.
This application reaquires Java 1.70. It does not start in Windows 7 64 when using Java 8-something